The present invention concerns a liquid spray EXTINTOR PER SHARE OF A GAS pressurized propellant (64) with a mixture of an additive (65) WITH LIQUID ONLY DURING THIS pressurization. According to the invention, the additive (65) AND GAS PRESSURE PRESSURE (64) ARE CONTAINED IN A BOTTLE OF EXPULSION (66) itself closed by a shutter (74) DRILL TO PUT PRESSURE liquid to be sprayed. CONCEPTION AND MAINTENANCE ARE SIMPLIFIED EXTINTOR and reliability is improved.
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